Improvement in derricks



f v f l A "2 Sheets--SheatL L.E. 'I'R'UESDELL'y f D erricks.

\ lN'o.1455,776. A v l Patented oc:.6,1s74.

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- UNITED *STATES APATENT OFFICE..

Lucius E. TRUESDELL, oir-WARREN, MASSACHUSETTS.

vIMFVROV'EMNTVIN IDERRICKS.V

Specification forming part of Letters Patent No. 155,776, dated October6, 1874; application filed `July 22, 1874.

To all whom it may concern:

Be it known that I, Lucius E. TRUESDELL, of Warren, in the county ofWorcester and State of Massachusetts, have invented certain new anduseful Improvements in Derricks; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilledin the. art to which it pertains to make and usethe same, reference being had to the accompany-- ing drawings, and tothe letters of reference marked thereon, which form a part of thisspecnication, in which- Figure 1 represents a rear elevation of aderrick' having my improvements applied thereto; and Fig. 2, a sideelevation of the same; Fig. 3, a plan, and Fig. 4a cross-section, of themast through line :c w of Fig.

1. Fig. 5 represents a plan of the lowest `ring of the mast with itsattachments, as detached from mast and boom.

My invention relates to a new and improved mode of constructing aderrick, whereby the' bring the body to be lifted over the point orplace at which it is-to be set or laid. Thirdly,

in combining therewith certain other devices by means of which, when thebody raised has been set in place, thesliding block isreleased andallowed to descend to its normal position, readyfor a new lift.Fourthly, it consists in a novel construction of the mast, whereby itcan, while combining the requisite strength, be made much lighter andmore easy to handle than heretofore. y

To enable others skilled in the art to make, construct, and use myinvention, I will now proceed to describe its parts in detail.

'lhe bed-plate or supporting-frame Amay be made in the usual manner. Themast B, however, instead of being made out of asolid spar, is made of Vanumber of strips, B', of wood 0r metal, clamped together in the mannerof the staves of a` barrel by means of rings C, each stave or stripfitting into a notch formed in the periphery of a disk, a, Fig. 3, whichis `arranged immediately opposite the rings C.

Of the rings C and disks a, two or more may be used for the purposebetween the ends of the mast; three are shown in the drawings. Each endof the mast is also tted with aring, the lower one, b, being cast on orotherwise secured to a plate, c, on which is formed an upright iiange,c, to which :is secured the lower rail D of the Aframe E, on which aremounted the drums around which the ropes or chainsV are wound thatoperate the blc cks. The front side of plate c is also provided at itssides with two'lugs, d, which project in front of the mast; In theselugsare formed the bearings of the pin e, on which the lower end of the boomis hinged or pivoted. The ring C, immediately above this, is alsoprovided with lugs to which the upper rail D ofthe frame E is rmlysecured by bolts and nuts. To the under side of plate c iS secured apivot,

`1],"on whichl the mast rests and turns, and which .fits into a stepformed in the bed-plate A. The top of the mast, as before stated, is

'also provided with a ring, C, which I term a cap-ring, on the front ofwhich is formed an ear, d', provided with an opening for the attachmentof the hooked end of a link-rod or chain, F. Instead of one link-rodseveral may be used, Jdie lower end of the lower one of which isintended to be loosely connected to the vupper end of a loop, G, the twolower .ends of which are hooked into lugs c', formed on the upper sideof the traveling sheaveblock H, which slides back and forth onguidetongues formed on the inner side of the two` parts or halves, j',which form the boom.

rlhese tongues take into grooves formed on either side of the travelingor race block H; The boom, as before stated, is composed of two halves,f, connected together at their lower ends by means of a'stout-frame-piece, I, on each side of which is formed a socket for thereception of the two'pieces, f, which form the boom. This frame-pieceIismounted near its lower end upon a pivotal pin, e, which passes throughit and through the lugs el, formed on the front side of the plate c,which carries the ring b and pivotal pin g', on which.

tached or secured. 'The other end of ropev j is made to pass around asheave-wheel, K, loosely mounted on the pivotal pin e, on which thelower end of the boom turns, and thence passes around a drum, J, whichis mounted in suitable bearings made fast to theframe E before referredto. `The traveling vor race block H consists of a metallic frame inwhich is se cured the pivotal pin of two or more sheavewheels, a, aroundwhich the rope or chain lis made to pass. and thence around the sheaveor sheaves n of the traveling-block K, in the usual manner of reevngblocks.

The other end of rope or chain lpasses over a sheave-wheel, m, whichturns on la pin mounted in hangers secured to the upper capring C on thetop of the mast, and thence around a drum, M, arranged to turn' insuitable bearings made fast to the frame E at a point` some distanceabove drum J. Intermediate between drums M and J is interposed awindlass, N, mounted in suitable bearings secured to the frame E, eachend of which is fitted with crank-handles O. At either end of drum M,and firmly keyed to vits shaft, is secured a pinion, the one, o, at theone end being smaller than the other, p, at the other, for a purpose tobe hereafter described. The windlass N is also provided with a pinion ateach end, the one, q, of which is made larger than the other, r, bothbeing loose on the shaft. The larger one, q, is arranged to gear withthe smaller pinion o of the drum M, and the smaller one, 1^, with thelarger one, p, of the same drum. The inner face of each of the pinions qand r is provided with one or more teeth, which are intended to engageor mesh 'with notches cut in the outer faces ,of two slide-clutches, sand t, the notches of clutch s being intended to engage with the teethof pinion q, and those of t with the teeth of pinion r. Each of theseclutches is provided with a spline, which slides in a groovelongitudinally cut in the periphery of the shaft of the windlass N. Eachof these clutches around their periphery is provided with a deep groove,into which fits the sides of a lever-the one, u, for clutchs, and theother, o, for clutch t. A weighted pawl, w, is arranged to mesh into theteeth of the pinion a', which is made fast to to the shaft of the drumJ, so as to stop its motion whenever required. Pinion x is intended tomesh with the teeth of the pinion q of the windlass N. Drum J is so madeas to slide back and forth on the pin or shaft on which it is mounted soas to throw 4it in and out of gear with the pinion q whenever required.IWhen throwninto gear with pinion qit is held in place by means of apivoted stay-lever, 111 secured to the inner face of the right-handstandard of frame E. Abrakestrap, z, is made to pass around the stem ofpinion r, its lower end being attached to a footbrake lever, z', for alpurpose to be hereafter described. The other end of the brake-strap zis made fast to cross-piece l, which binds the standards of theframe Etogether at or near their middle. y,T o the upper edge of this samecross-piece l the levers u and 'u are piv'oted, which operate theclutches s and tof the windlass N.

Thus constructed, the operation is as follows: The race-block H islowered until the traveling-block K hangs vertically above the weight orbody to be moved, The latter is then lowered by allowing the drum M toturn -until itshook can be fastened into the loops,

which pass around the body to be raised.

:The lowering of block K is eected in the following manner: Drum J ismade to slide along its shaft until its pinion x is fairly out of gearwith the pinion q of the windlass N. Slide-clutches s and t are thenmoved out of gear with their respective pinionsq and r, and so held bytheir shippinglevers u and fu. This, then, leaves drum M free to turn,so as to furnish the necessary amount of slack to allow block K todescend. As drum M turns, its

piuionso and p also revolve, turning pinions q and of of Windlass N; butthey, being out of gear with their respective clutches, and with thepinion w of drum J, simplyturn loosely on the shaft of the windlass. Theblock thus hooked to the body to be raised, if the latter lies in avertical plane with the place at which it is to be deposited, then drumJ is allowed to, remain with the pinion x disconnected with the pinion qof the windlass, when, if the weight is great, the clutch tis throwninto gear with the teeth of pinion r of the windlass, and there held byits shipping-lever e.

The apparatus is then ready to raise the body to the height required toplace itin proper position by simply turning windla'ss N, and is thenlowered, as in the case of the ordinary i derrick.

into gear with pinion q, and then raised, as

as before. ever, not lie in the same vertical plane with the spot 'atwhich it is desired to place it, then l drum J is made to slide alongits shaft until the teeth of its pinion w mesh with the teeth of thepinion q of the windlass. This done, its

stay-lever y is then raised behind its end, so

as to keep it in place.

At this stage, the question is then to be considered whether it has totravel farther in'a horizontal or in a vertical plane in order to reachthe point at which it is to be placed. If

If, however, the body to be raised is not A very heavy, instead ofthrowing the clutch t of pinion fr into gear, the clutch sis thrown!l ithas to be raised much higher than it has to be moved horizontally, thenclutch sis thrown into gear with pinion q, otherwise clutch t withpinion 1^. This done, the4 hands man the windlass, when drum M willraise blockK and the weight, through, `its ropeV or chain Z, and drum Jsimultaneously therewith, through its rope or chain j, drag outwardrace-blockH,

carrying therewith block K and the weight in a horizontal direction.This operation will continue until the block iseither high enough todeposit the body or far enough outward to" gradually lowered to itsplace in the usual manner. If the weight is, great, the brakestrap z,through its treadle z', is brought to bear on the face of pinion'c, inorder to arrest its too sudden descent, and thus aid the hands at thewindlass; but if it is carried out faster, so as to reach the verticalplane in the line of which it is to be deposited, then drum J, with itspinion x, is thrown out of gear with pinion q, and pawl w made to engagewith one of the teeth of pinion x, so as to hold drum J in thatposition, while traveling-block K is still farther raised through theaction of the windlass N and one of its pinions on the correspondingpinion of drum M. It now being sufficiently high, and in a verticalplane with the spot at whichit is to be deposited, the boom is thenturnedin and the body lowered as before. A derrick thus made andoperated possesses great advantages over the ordinary derrick, aswillbeapparent to any one at all conversantwith their operation; and can bemanaged by much fewer hands than is absolutely required by the latterfor raising and placing large and heavy bodies, andin less than half`the time; `and it is also to be ob V served that, while the primaryaction of drum J on race-block H is to draw the latter outward, in ahorizontal direction, it, at the same time, through the action of thelink-rod F, as attached to the block H, also serves to assist in.raisingthe weight, inasmuch as link-rod F, it being pivoted to the topofthe mast, and to the race-block, acts as aradial arm, and,consequently, as block H moves outward, correspondingly raises the boom,and with it the Weight. The body once`deposited, and block K detachedtherefrom, the blocks H and K will, by virtue of their own gravity, thendescend by simply detaching `the pawl 'w from the teeth of pinion F, forwhich purpose its weighted end may be raised and held in that positionby means of a` pivotal supportingarm, 2, attached to the front of theleft-hand standard of theframe E, pinion w, for this purpose, being alsodisengaged from the pinion q of the windlass. Instead of connecting thechain or link rod Fdirectly to the race- `block H, it may, if desired,be entirely detached therefrom, and directly attached, by means ofeye-bolts secured to the outer end of the boom, as shown indotted linesin Fig. 2. By this plan, (and it may be so made as to beinterchangeable-that is to say, the linkrod or chain maybe so made as tobe hooked at its lower end either tothe race-block or to the eye-boltson .the end of the boom,).the

race-block may be moved outward to the end of the boom in an inclinedplane, and not in a curved line, as it otherwise would be if at- 'tacheddirectly to the race-block. Moreover,

link-rods of different lengths, -or chains withV removable'hooks, may beused, so as to vary theV inclination of the boom, as required, accordingas the work progresses.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is Y 1. The combination of the boom of aderrick, made in two parts, f f, each of which is p provided with atongue or groove, with a racey block, H, correspondingly constructed, soa's to slide or move therein, in the manner sub- 4 stantially as and forthe purposes set forth.

2. The combination of arace-block, H, rope or chain j, sheave-wheelsiand lc, and drum J, substantially as and for thepurpose set forth. 3.The combination of, traveling-block K, chain or rope l, and drum M, withrace-block H, chain or rope j, druln J, and windlass N, substantially asset forth. y ,Y

4. The combination of the sleeve-clutches s and t, pinionsq and o", andwindlass N, with` pinions 0 and p, of drum M and sliding drum I J, asand for the purpose set forth.

5. The mast of'a derrick, when made-of a number of strips or slats B',clamped together by means of rings C and disks a, in the manner and forthe purposes set forth.

In testimony that Iclaim the foregoing as Vmy own I affix my'si gnaturein presence of two witnesses.

LUGIUS E. TRUESDELL. Witnesses:

l). G. STUART,

BHANNAY.

